Security Architecture Manager: Cloud & IT/OT Security

Ernst & Young; City Of London; Hybrid; GBP 100,000 - 140,000; Full time

Benefits offered by this job

Flexible working and Total Rewards

Career development opportunities

Diversity and inclusive culture

Job summary

EY in London, Manchester or Scotland seeks a Security Architect - Manager to lead security architecture delivery for enterprise IT/OT environments. You will craft cloud security architectures, include threat models, and mentor junior staff. The role supports client engagements, proposals, and business development.

Travel to client sites is required. The role demands TOGAF/NIST/NIS2 expertise, advanced Visio skills, and a track record in secure design for complex systems with strong client

Qualifications

• Proven experience delivering security architecture for IT/OT converged environments.
• Strong hands-on design and governance capabilities across cloud and on-premises.
• TOGAF or equivalent architecture methods with relevant certifications preferred.

Responsibilities

• Deliver security architecture work packages, including HLD/LLD artefacts and threat models.
• Develop cloud security architecture for site-to-cloud connectivity and landing zones.
• Mentor junior staff, support business development, and contribute to client proposals.

Skills

Security architecture delivery

IT/OT convergence

Advanced Visio

TOGAF or equivalent

NIST CSF

IEC 62443

NCSC CAF

EU NIS2

Cloud security

PAM & ZTNA

Identity integration

MITRE ATT&CK

UK government clearances

Travel for client delivery

Mentoring & leadership

Tools

Visio

Microsoft Sentinel

Microsoft Entra ID

Microsoft Defender for Cloud

SIEM/SOAR

Job description

EY in London, Manchester or Scotland seeks a Security Architect - Manager to lead security architecture delivery for enterprise IT/OT environments. You will craft cloud security architectures, include threat models, and mentor junior staff. The role supports client engagements, proposals, and business development.

Travel to client sites is required. The role demands TOGAF/NIST/NIS2 expertise, advanced Visio skills, and a track record in secure design for complex systems with strong client